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fbe6c09b7e
Add 3 per-cpu monitors as part of the sched model:
* scpd: schedule called with preemption disabled
Monitor to ensure schedule is called with preemption disabled
* snep: schedule does not enable preempt
Monitor to ensure schedule does not enable preempt
* sncid: schedule not called with interrupt disabled
Monitor to ensure schedule is not called with interrupt disabled
To: Ingo Molnar <mingo@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Kacur <jkacur@redhat.com>
Cc: Clark Williams <williams@redhat.com>
Link: https://lore.kernel.org/20250305140406.350227-6-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ftrace.h>
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#include <linux/tracepoint.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/rv.h>
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#include <rv/instrumentation.h>
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#include <rv/da_monitor.h>
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#define MODULE_NAME "sncid"
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#include <trace/events/sched.h>
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#include <trace/events/preemptirq.h>
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#include <rv_trace.h>
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#include <monitors/sched/sched.h>
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#include "sncid.h"
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static struct rv_monitor rv_sncid;
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DECLARE_DA_MON_PER_CPU(sncid, unsigned char);
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static void handle_irq_disable(void *data, unsigned long ip, unsigned long parent_ip)
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{
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da_handle_event_sncid(irq_disable_sncid);
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}
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static void handle_irq_enable(void *data, unsigned long ip, unsigned long parent_ip)
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{
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da_handle_start_event_sncid(irq_enable_sncid);
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}
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static void handle_schedule_entry(void *data, bool preempt, unsigned long ip)
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{
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da_handle_start_event_sncid(schedule_entry_sncid);
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}
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static void handle_schedule_exit(void *data, bool is_switch, unsigned long ip)
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{
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da_handle_start_event_sncid(schedule_exit_sncid);
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}
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static int enable_sncid(void)
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{
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int retval;
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retval = da_monitor_init_sncid();
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if (retval)
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return retval;
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rv_attach_trace_probe("sncid", irq_disable, handle_irq_disable);
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rv_attach_trace_probe("sncid", irq_enable, handle_irq_enable);
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rv_attach_trace_probe("sncid", sched_entry_tp, handle_schedule_entry);
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rv_attach_trace_probe("sncid", sched_exit_tp, handle_schedule_exit);
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return 0;
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}
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static void disable_sncid(void)
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{
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rv_sncid.enabled = 0;
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rv_detach_trace_probe("sncid", irq_disable, handle_irq_disable);
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rv_detach_trace_probe("sncid", irq_enable, handle_irq_enable);
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rv_detach_trace_probe("sncid", sched_entry_tp, handle_schedule_entry);
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rv_detach_trace_probe("sncid", sched_exit_tp, handle_schedule_exit);
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da_monitor_destroy_sncid();
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}
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static struct rv_monitor rv_sncid = {
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.name = "sncid",
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.description = "schedule not called with interrupt disabled.",
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.enable = enable_sncid,
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.disable = disable_sncid,
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.reset = da_monitor_reset_all_sncid,
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.enabled = 0,
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};
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static int __init register_sncid(void)
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{
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rv_register_monitor(&rv_sncid, &rv_sched);
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return 0;
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}
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static void __exit unregister_sncid(void)
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{
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rv_unregister_monitor(&rv_sncid);
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}
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module_init(register_sncid);
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module_exit(unregister_sncid);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Gabriele Monaco <gmonaco@redhat.com>");
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MODULE_DESCRIPTION("sncid: schedule not called with interrupt disabled.");
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